Perhaps you should try some spelling variations:
dang mau » dong mau, dang van, dang su
te sach » toc sach
vu cham » va cham, tu cham, qua cham
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
vu kham » vu khanh
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, ve chim
mau hoi » cau hoi, mai hoi, mau ho
ky dang » ky nang, ky danh
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang mau hoi. hieu ((ve cham) or (((vu cham) or (vu kham)))) luc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang mau hoi. hieu ((ve cham) OR (((vu cham) OR (vu kham)))) luc va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky dang mau hoi. hieu ((ve cham) or (((vu cham) or (vu kham)))) luc va hanh va cua tre*.